First off, I am so sorry to hear that your son is enduring with such pain! Regardless of what it is I would go right out and buy a bottle of Colloidal Silver and a dropper and I would be applying it to the sores directly. I would do this at 1-2 hour intervals and I would let him be diaperless for much of the day!! Colloidal silver will kill over 600 different types of bacteria and infections. Including very favorable results with Herpes... if you look up info on it even through wikipedia , it has been used for years!!